Washington Capitals center Matt Hendricks, right, is congratulated by teammate Karl Alzner after scoring a goal during the first period of an NHL hockey game against the Tampa Bay Lightning in Tampa, Fla., Tuesday, Jan. 31, 2012.(AP Photo/Phelan M. Ebenhack)— AP

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Washington Capitals center Matt Hendricks, right, is congratulated by teammate Karl Alzner after scoring a goal during the first period of an NHL hockey game against the Tampa Bay Lightning in Tampa, Fla., Tuesday, Jan. 31, 2012.(AP Photo/Phelan M. Ebenhack)
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Tampa Bay Lightning defenseman Pavel Kubina, right, and the Washington Capitals' Jason Chimera battle for the puck during the first period of an NHL hockey game in Tampa, Fla., Tuesday, Jan. 31, 2012.(AP Photo/Phelan M. Ebenhack)— AP

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Tampa Bay Lightning defenseman Pavel Kubina, right, and the Washington Capitals' Jason Chimera battle for the puck during the first period of an NHL hockey game in Tampa, Fla., Tuesday, Jan. 31, 2012.(AP Photo/Phelan M. Ebenhack)
/ AP

Martin St. Louis had a second-period goal and assisted on the game-winner, sending a point-blank shot off goalie Tomas Vokoun's pads and giving Stamkos an opportunity to tap in the rebound. The sequence began with Tampa Bay goalie Mathieu Garon stopping two shots at the other end of the ice.

Matt Hendricks, Mathieu Perreault and Troy Brouwer scored for the Capitals, who rallied from a two-goal deficit to force overtime despite playing without suspended star Alex Ovechkin.